 
                 Patent Grant
 Patent Grant
                     D280710
 D280710
                    | Number | Name | Date | Kind | 
|---|---|---|---|
| D5130 | Hurtell | Jul 1871 | |
| D57580 | Brant | Apr 1921 | |
| D198342 | Taylor et al. | Jun 1964 | |
| D224646 | Vollguartz | Aug 1972 | |
| D263565 | Woinarski | Mar 1982 | |
| 3850328 | Guala | Nov 1974 | |
| 4347939 | Upton | Sep 1982 | |
| 4461391 | Davis | Jul 1984 |